Update artifact/package/module names across all three app languages

- Java: org.whispersystems:signal-client-java ->
    org.signal:libsignal-client
- Java: org.whispersystems:signal-client-android ->
    org.signal:libsignal-android
- Java: org.whispersystems:libsignal-server ->
    org.signal:libsignal-server
- Swift: SignalClient -> LibSignalClient
- NPM: @signalapp/signal-client -> @signalapp/libsignal-client
- Repository: github.com/signalapp/libsignal-client ->
    github.com/signalapp/libsignal

LibSignalClient.podspec

@@ -0,0 +1,85 @@
+#
+# Copyright 2020-2022 Signal Messenger, LLC.
+# SPDX-License-Identifier: AGPL-3.0-only
+#
+
+Pod::Spec.new do |s|
+  s.name             = 'LibSignalClient'
+  s.version          = '0.14.0'
+  s.summary          = 'A Swift wrapper library for communicating with the Signal messaging service.'
+
+  s.homepage         = 'https://github.com/signalapp/libsignal'
+  s.license          = 'AGPL-3.0-only'
+  s.author           = { 'Signal Developers' => 'ios@signal.org' }
+  s.source           = { :git => 'https://github.com/signalapp/libsignal.git', :tag => "v#{s.version}" }
+
+  s.swift_version    = '5'
+  s.platform         = :ios, '10'
+
+  s.dependency 'SignalCoreKit'
+
+  s.source_files = ['swift/Sources/**/*.swift', 'swift/Sources/**/*.m']
+  s.preserve_paths = [
+    'target/*/release/libsignal_ffi.a',
+    'swift/Sources/SignalFfi',
+  ]
+
+  s.pod_target_xcconfig = {
+      'HEADER_SEARCH_PATHS' => '$(PODS_TARGET_SRCROOT)/swift/Sources/SignalFfi',
+      # Duplicate this here to make sure the search path is passed on to Swift dependencies.
+      'SWIFT_INCLUDE_PATHS' => '$(HEADER_SEARCH_PATHS)',
+
+      # Make sure we link the static library, not a dynamic one.
+      # Use an extra level of indirection because CocoaPods messes with OTHER_LDFLAGS too.
+      'LIBSIGNAL_FFI_LIB_IF_NEEDED' => '$(PODS_TARGET_SRCROOT)/target/$(CARGO_BUILD_TARGET)/release/libsignal_ffi.a',
+      'OTHER_LDFLAGS' => '$(LIBSIGNAL_FFI_LIB_IF_NEEDED)',
+
+      'CARGO_BUILD_TARGET[sdk=iphonesimulator*][arch=arm64]' => 'aarch64-apple-ios-sim',
+      'CARGO_BUILD_TARGET[sdk=iphonesimulator*][arch=*]' => 'x86_64-apple-ios',
+      'CARGO_BUILD_TARGET[sdk=iphoneos*]' => 'aarch64-apple-ios',
+      # Presently, there's no special SDK or arch for maccatalyst,
+      # so we need to hackily use the "IS_MACCATALYST" build flag
+      # to set the appropriate cargo target
+      'CARGO_BUILD_TARGET_MAC_CATALYST_ARM_' => 'aarch64-apple-darwin',
+      'CARGO_BUILD_TARGET_MAC_CATALYST_ARM_YES' => 'aarch64-apple-ios-macabi',
+      'CARGO_BUILD_TARGET[sdk=macosx*][arch=arm64]' => '$(CARGO_BUILD_TARGET_MAC_CATALYST_ARM_$(IS_MACCATALYST))',
+      'CARGO_BUILD_TARGET_MAC_CATALYST_X86_' => 'x86_64-apple-darwin',
+      'CARGO_BUILD_TARGET_MAC_CATALYST_X86_YES' => 'x86_64-apple-ios-macabi',
+      'CARGO_BUILD_TARGET[sdk=macosx*][arch=*]' => '$(CARGO_BUILD_TARGET_MAC_CATALYST_X86_$(IS_MACCATALYST))',
+
+      'ARCHS[sdk=iphonesimulator*]' => 'x86_64 arm64',
+      'ARCHS[sdk=iphoneos*]' => 'arm64',
+  }
+
+  s.script_phases = [
+    { :name => 'Check libsignal-ffi',
+      :execution_position => :before_compile,
+      :script => %q(
+        test -e "${LIBSIGNAL_FFI_LIB_IF_NEEDED}" && exit 0
+        if test -e "${PODS_TARGET_SRCROOT}/swift/build_ffi.sh"; then
+          echo 'error: libsignal_ffi.a not built; run the following to build it:' >&2
+          echo "CARGO_BUILD_TARGET=${CARGO_BUILD_TARGET} \"${PODS_TARGET_SRCROOT}/swift/build_ffi.sh\" --release" >&2
+        else
+          echo 'error: libsignal_ffi.a not built; try re-running `pod install`' >&2
+        fi
+        false
+      ),
+    }
+  ]
+
+  s.prepare_command = %q(
+    set -euo pipefail
+    CARGO_BUILD_TARGET=aarch64-apple-ios swift/build_ffi.sh --release
+    CARGO_BUILD_TARGET=x86_64-apple-ios swift/build_ffi.sh --release
+    CARGO_BUILD_TARGET=aarch64-apple-ios-sim swift/build_ffi.sh --release
+    CARGO_BUILD_TARGET=x86_64-apple-ios-macabi swift/build_ffi.sh --release --build-std
+    CARGO_BUILD_TARGET=aarch64-apple-ios-macabi swift/build_ffi.sh --release --build-std
+  )
+
+  s.test_spec 'Tests' do |test_spec|
+    test_spec.source_files = 'swift/Tests/*/*.swift'
+    test_spec.pod_target_xcconfig = {
+      'LIBSIGNAL_FFI_LIB_IF_NEEDED' => '',
+    }
+  end
+end